The early monastery was founded by St. Maedoc of Ferns at the end of the 6thc. There are records of Erenaghs ( O'Farrellys) dying there in 1025 and 1095. Conaing, who died in 1059 was also coarb of Ferns. The monastery was probably refounded as Arrosian by St.Malachy 1143-8 subject to St.Mary's Abbey Kells. In 1432 and 1436 indulgences were granted for the building or repairing of the cloister, refectory and other necessary buildings. In 1844 the interior of the tower was excavated by Getty, however, his principle findings were of graveyard debris. The site is currently under the care of the Office of Public Works.